BEARING-SLEEVE 4N0685 - Caterpillar

Disassembly Procedure For The VTC 254 Turbocharger
Start By:
Remove the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove".
Check the turbocharger's nameplate for the model. Use the appropriate disassembly procedure depending on the type of turbocharger. If the model or type on the turbocharger's nameplate reads C254xx-xxxxxx, use the disassembly procedure for the VTC 254 Turbocharger. If the model or type on the turbocharger's nameplate reads NA 297 or Napier 297, use the disassembly procedure for the NA 297 Turbocharger.
Illustration 1 g01294470
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9U-6251 Suspension Yoke(1) 1
B 126-8290 Spanner Wrench(2) 2
C 9U-6248 Guide Bolts(1) 3
D 9U-6243 Extension Handle(3) 1
E 9U-6244 Support(1) 2
F 9U-6255 Turbocharger Tool(2) 1
G 9U-6253 Shaft Assembly(3) 1
H 503-1854 Hydraulic Puller(2) 1
J 9U-6256 End Plug(2) 1
K 1D-4614 Bolt(2) 1
L 1D-5119 Nut 1
M 1U-5230 Hand Hydraulic Pump(3) 1
N 8F-0024 Hose Assembly 2
P 9U-6246 Adapter Assembly(3) 1
Q 133-8951 Thrust Bearing Screw(3) 1
R 138-7573 Link Bracket 2
(1) This component is a part of the 9U-5105 Basic Engine Tool Group.
(2) This component is a part of the 9U-6249 Cylinder Tool Group.
(3) This component is a part of the 9U-6250 Hydraulic Pump.Note: The following procedure shows a turbocharger that is removed from the engine. It is not always necessary to remove the turbocharger to perform this procedure.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g00623402
Place the turbocharger in position on an appropriate work bench. Mark the position of all the components of the turbocharger. This marking of the components will ease the assembly process.
Illustration 3 g01294227
Attach Tooling (R) and a suitable lifting device to elbow (1). The weight of elbow (1) is approximately 21 kg (46 lb). Remove bolts (2) and the washers. Remove elbow (1).
Illustration 4 g00623594
Illustration 5 g01298057
Attach Tooling (A) and a suitable lifting device to compressor housing (4). The weight of compressor housing (4) is approximately 95 kg (209 lb). Refer to Illustration 5.
Remove three bolts (3) and the washers.
Install Tooling (C). Refer to Illustration 5. Remove remaining bolts (3) and the washers. Remove bolts (5) and the washers.
Illustration 6 g01298061
Do not allow the compressor housing to contact the impeller assembly during the removal procedure. Damage to the impeller assembly and the compressor housing may result.
Use bolts (3) as forcing screws, and remove compressor housing (4). Do not tilt the compressor housing. Damage could occur to impeller assembly (6).
Illustration 7 g01294253
Attach a suitable lifting device to bearing housing (8). The weight of bearing housing (8) is approximately 41 kg (90 lb). Remove bolts (7) and install Tooling (C).
Illustration 8 g00623663
Install bolts (7) as forcing screws and remove bearing housing (8).Note: Remove bearing